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The civic "capital" of the Shasta Cascade area is Redding; other major cities are Alturas, Biggs, Chico, Oroville and Yreka. Counties included in the Shasta Cascade region include ButteButte County is a county located in California's Central Valley, north of Sacramento. As of the 2000 census, it had a population of 203,171. 2003 figures place this at 210,400. The county seat is Oroville. Butte County is watered by the Sacramento River., LassenLassen County is a county located in northeastern California. As of 2000 the population was 33,828. The county seat is Susanville, the only incorporated city in the county. History Lassen County was formed in 1864 from parts of Plumas and Shasta Counties., ModocModoc County is a county located in California's far northeast corner, bounded by Oregon to the north and Nevada to the east. As of 2000, its population was 9,449. Its population in 2002 was estimated at 9,289. The county seat is Alturas, the county's onl, PlumasPlumas County is a county located in California's Sierra Nevada. The county gets its name from the Spanish words for the Feather River Rio de las Plumas , which flows through the county. As of 2000, the population is 20,824. The county seat is Quincy., ShastaShasta County is a county located in northern California, in the Cascade Mountains. As of 2000 the population was 163,256. The county seat is Redding. Shasta County is the home of Mount Shasta, Lassen Peak, Shasta Lake, and the Lassen Volcanic National Pa, SiskiyouSiskiyou County is a county located in far northernmost California, in the Cascade Mountains on the Oregon border. As of 2000 the population was 44,301. The county seat is Yreka. History Siskiyou County was formed from parts of Shasta and Klamath Counties, TehamaTehama County is a county located in Northern California. It is bisected by the Sacramento River. As of 2000 its population was 56,039. The county seat is Red Bluff. History Tehama County was formed from parts of Butte, Colusa and Shasta Counties in 1856. and TrinityTrinity County is a county located in northwestern California, along the Trinity River and among the Cascade Mountains. As of 2000 its population was 13,022. Its county seat is Weaverville. There are no incorporated cities in Trinity County. Trinity Count.
There are seven national forests in the area: Klamath National Forest , Lassen National Forest , Mendocino National Forest, Modoc National Forest , Plumas National Forest and Shasta-Trinity National Forests , as well as the Lava Beds National Monument.
Geologically, this region is similar to the main Cascade Range, dominated by volcanism.